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Advisories

Jadaptive Maverick Synergy Server before 3.0.33 and 3.1.x before 3.1.7, and Maverick Legacy Server before 1.8.1, SSH Public Key Cross-User Authentication Bypass

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Severity
high
Date
Affecting

  • Maverick Synergy Server >= 0, < 3.0.33

  • Maverick Synergy Server >= 3.1.0, < 3.1.7

  • Maverick Legacy Server >= 0, < 1.8.1

CWE
  • CWE-305 Authentication Bypass by Primary Weakness
CVSS
8.7
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Credit
Jadaptive Limited
Description
Jadaptive Maverick Synergy Server before 3.0.33 and 3.1.x before 3.1.7, and Maverick Legacy Server before 1.8.1, contain an authentication bypass vulnerability in SSH public key authentication that reuses cached key authorization decisions across usernames. Attackers holding a key authorized for one account can authenticate it, then send a signed SSH_MSG_USERAUTH_REQUEST with a different username on the same connection to log in as that account.

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